1、Designation: B951 11Standard Practice forCodification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought1This standard is issued under the fixed designation B951; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This practice provides a system for designating unal-loyed magnesium and magnesium-alloys that have been usedcomme
3、rcially since 1952, and thus is intended to be theregistration source for unalloyed magnesium and magnesium-alloys. A record of designations along with the establishedcompositions is given in Table 2.1.2 The equivalent Unified Numbering System (UNS) alloydesignations shown in the appendixes are in a
4、ccordance withPractice E527.2. Referenced Documents2.1 The following documents form a part of this practice tothe extent referenced herein:2.2 ASTM Standards:2B80 Specification for Magnesium-Alloy Sand CastingsB90/B90M Specification for Magnesium-Alloy Sheet andPlateB91 Specification for Magnesium-A
5、lloy ForgingsB92/B92M Specification for Unalloyed Magnesium Ingotand Stick For RemeltingB93/B93M Specification for Magnesium Alloys in IngotForm for Sand Castings, Permanent Mold Castings, andDie CastingsB94 Specification for Magnesium-Alloy Die CastingsB107/B107M Specification for Magnesium-Alloy E
6、xtrudedBars, Rods, Profiles, Tubes, and WireB199 Specification for Magnesium-Alloy Permanent MoldCastingsB403 Specification for Magnesium-Alloy Investment Cast-ingsB843 Specification for Magnesium Alloy Anodes for Ca-thodic ProtectionE527 Practice for Numbering Metals and Alloys in theUnified Number
7、ing System (UNS)3. Basis of Codification3.1 The designations for alloys and unalloyed metals arebased on their chemical composition limits.NOTE 1For unalloyed magnesium, magnesium-alloys, cast andwrought, standard limits for alloying elements and impurities are ex-pressed to the following places:Les
8、s than 0.0001 % (used only for magnesium alloys) 0.0000X0.0001 to 0.001 % 0.000X0.001 to 0.01 % 0.00X0.01 to 0.10 %Unalloyed aluminum made by a refining process 0.0XXAlloys and unalloyed aluminum or magnesiumnot made by a refining process0.0X0.10 through 0.55 % 0.XXOver 0.55 % 0.X,X.X,XX.X3.2 Design
9、ations shall be assigned, revised, and cancelledby Subcommittee B07.04 of ASTM Committee B07 on LightMetals and Alloys on written requests to its chairman. Com-plete chemical composition limits shall be submitted withrequest for assignment or revision of designations. Arbitraryassignments by other s
10、ubcommittees or committees will not berecognized.4. Alloys4.1 Designation for alloys shall consist of not more than twoletters representing the alloying elements (Note 2) specified inthe greatest amount, arranged in order of decreasing percent-ages, or in alphabetical order if of equal percentages,
11、followedby the respective percentages rounded off to whole numbersand a serial letter (Note 3). The full name of the base metalprecedes the designation, but it is omitted for brevity when thebase metal being referred to is obvious.NOTE 2For codification, an alloying element is defined as an element(
12、other than the base metal) having a minimum content greater than zeroeither directly specified or computed in accordance with the percentagesspecified.1This practice is under the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the direct responsibility of Subcommittee B07.04 onMa
13、gnesium Alloy Cast and Wrought Products.Current edition approved Nov. 1, 2011. Published January 2011. Originallyapproved in 2007. Last previous edition approved in 2010 as B951 10. DOI:10.1520/B0951-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Ser
14、vice at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 194
15、28-2959, United States.NOTE 3The serial letter is arbitrarily assigned in alphabetical se-quence starting with “A” (omitting “I” and “O”) and serves to differentiateotherwise identical designations. A serial letter is necessary to completeeach designation.4.2 The letters used to represent the two gr
16、eatest amounts ofthe alloying elements shall be those in Table 1.4.3 In rounding percentages, the nearest whole number shallbe used. If two choices are possible as when the decimal isfollowed by a 5 only, or a 5 followed only by zeros, the nearesteven whole number shall be used.4.4 When a range is s
17、pecified for the alloying element, therounded mean shall be used in the designation.4.5 When only a minimum percentage is specified for thealloying element, the rounded minimum percentage shall beused in the designation.5. Unalloyed Metals5.1 Designations for unalloyed metals consist of the speci-fi
18、ed minimum purity, all digits retained but dropping thedecimal point, followed by a serial letter (Note 3). The fullname of the base metal precedes the designation, but it isomitted for brevity when the base metal being referred to isobvious.6. Keywords6.1 magnesium; UNS designationsTABLE 1 Letters
19、Representing Alloying ElementsAAluminum QSilverCCopper SSiliconERare earths TTin*HThorium* VGadoliniumJStrontium WYttriumKZirconium ZZincLLithium* *For historical referenceMManganeseB951 112TABLE 2 Unalloyed Magnesium and Magnesium-Alloy Registration(A Registration Record of Magnesium Alloys with Es
20、tablished Designations and Chemical Composition)NOTECast or wrought product compositions may differ from casting ingot compositions.Designation Chemical Composition, % max unless shown as a range or as a minPractice UNSSeeASTMMagnesium Aluminum Calcium Copper Gadolinium Iron Lithium Manganese Neodym
21、ium Nickel RareEarthsSilicon Silver Strontium Yttrium Zinc ZirconiumOther ElementsSpecific Each Total9980A M19980 B92/B92M 99.80min0.02 0.10 0.001 0.01 Sn0.01 Pb0.006 Na0.059980B M19991 B92/B92M 99.80min0.02 0.10 0.005 0.01 Sn0.01 Pb0.059990AAM19990 B92/B92M 99.90min0.003 0.04 0.004 0.001 0.005 0.01
22、9995AAM19995 B92/B92M 99.95min0.01 0.003 0.004 0.001 0.005 0.01 Ti 0.0059998AAM19998 B92/B92M 99.98min0.004 0.0005 0.002 0.002 0.0005 0.003 0.001 Ti0.001 Pb0.005AJ52ABM17520 B94C4.5-5.50.010 0.004D0.24-0.6D0.001 0.10 1.7-2.30.22 0.01AJ52ABEM17521 B93/B93MC4.6-5.50.008 0.004 0.26 - 0.5 0.001 0.08 1.8
23、-2.30.20 0.01AJ62ABM17620 B94C5.5-6.60.010 0.004D0.24-0.6D0.001 0.10 2.0-2.80.22 0.01AJ62ABEM17621 B93/B93MC5.6-6.60.008 0.004 0.26-0.05 0.001 0.08 2.1-2.80.20 0.01AM50A M10500 B94C4.4-5.40.010 0.004D0.26-0.6D0.002 0.10 0.22 0.02AM50AEM10501 B93/B93MC4.5-5.30.008 0.004 0.28-0.50 0.001 0.08 0.20 0.01
24、AM60A M10600 B94C5.5-6.50.35 0.13-0.6 0.03 0.50 0.22AM60A M10601 B93/B93MC5.6-6.40.25 0.15-0.50 0.01 0.20 0.20 0.30AM60B M10602 B94C5.5-6.50.010 0.005D0.24-0.6D0.002 0.10 0.22 0.02AM60BEM10603 B93/B93MC5.6-6.40.008 0.004 0.26-0.50 0.001 0.08 0.20 0.01AM100A M10100 B80B199B403C9.3-10.70.10 0.10-0.35
25、0.01 0.30 0.30 0.30AM100A M10101 B93/B93MC9.4-10.60.08 0.13-0.35 0.010 0.20 0.2 0.30AS21A M10210 B94C1.8-2.50.01 0.005 0.18-0.7 0.001 0.7-1.20.20 0.01AS21AEM10211 B93/B93MC1.9-2.50.008 0.004 0.2-0.6 0.001 0.7-1.20.20 0.01AS21BBM10212 B94C1.8-2.50.008 0.0035 0.05-0.15 0.001 0.06-0.250.7-1.20.25 0.01A
26、S21BBEM10213 B93/B93MC1.9-2.50.008 0.0035 0.05-0.15 0.001 0.06-0.250.7-1.20.25 0.01AS41A M10410 B94C3.5-5.00.06 0.20-0.50 0.03 0.50-1.50.12AS41A M10411 B93/B93MC3.7-4.80.04 0.22-0.48 0.01 0.60-1.40.10 0.30B951113TABLE 2 ContinuedDesignation Chemical Composition, % max unless shown as a range or as a
27、 minPractice UNSSeeASTMMagnesium Aluminum Calcium Copper Gadolinium Iron Lithium Manganese Neodymium Nickel RareEarthsSilicon Silver Strontium Yttrium Zinc ZirconiumOther ElementsSpecific Each TotalAS41B M10412 B94C3.5-0.7D0.02 0.0035D0.35-0.7 0.002 0.50-1.50.12 0.02AS41BEM10413 B93/B93MC3.7-4.80.01
28、5 0.0035 0.35-0.6 0.001 0.60-1.40.10 0.01AZ31B M11311 B90/B90MB91B107/B107MB843C2.5-3.50.04 0.05 0.005 0.20-1.0 0.005 0.10 0.6-1.40.30AZ31C M11312 B107/B107MC2.4-3.60.10 0.15-1.0F0.03 0.10 0.50-1.50.30AZ31D M11313 B843C2.5-3.50.04 0.04 0.002 0.20-1.0 0.0010 0.05 0.6-1.40.01 0.30AZ61A M11610 B91B107/
29、B107MC5.8-7.20.05 0.005 0.15-0.5 0.005 0.10 0.40-1.50.30AZ63A M11630 B80C5.3-6.70.25 0.15-0.35 0.01 0.30 2.5-3.50.30AZ63A M11631 B93/B93MC5.5-6.50.20 0.15-0.35 0.010 0.20 2.7-3.30.30AZ63B M11632 B843C5.3-6.70.02 0.003 0.15-0.7 0.002 0.10 2.5-3.50.30AZ63C M11634 B843C5.3-6.70.05 0.003 0.15-0.7 0.003
30、0.30 2.5-3.50.30AZ63D M11636 B843C5.0-7.00.10 0.003 0.15-0.7 0.003 0.30 2.0-4.00.30AZ80A M11800 B91B107/B107MC7.8-9.20.05 0.005 0.12-0.5 0.005 0.10 0.20-0.80.30AZ81A M11810 B80B199B403C7.0-8.10.10 0.13-0.35 0.01 0.30 0.40-1.00.30AZ81A M11811 B93/B93MC7.2-8.00.08 0.15-0.35 0.010 0.20 0.5-0.90.30AZ91A
31、 M11910 B94C8.3-9.70.10 0.13-0.50 0.03 0.50 0.35-1.0AZ91A M11911 B93/B93MC8.5-9.50.08 0.15-0.40 0.01 0.20 0.45-0.90.30AZ91B M11912 B94C8.3-9.70.35 0.13-0.50 0.03 0.50 0.35-1.0AZ91B M11913 B93/B93MC8.5-9.50.25 0.15-0.40 0.01 0.20 0.45-0.90.30AZ91C M11914 B80B199B403C8.1-9.30.10 0.13-0.35 0.01 0.30 0.
32、40-1.00.30AZ91C M11915 B93/B93MC8.3-9.20.08 0.15-0.35 0.010 0.20 0.45-0.90.30AZ91D M11916 B94C8.3-9.70.030 0.005D0.15-0.50D0.002 0.10 0.35-1.00.02AZ91DEM11917 B93/B93MC8.5-9.50.025 0.004 0.17-0.40 0.001 0.08 0.45-0.90.01B951114TABLE 2 ContinuedDesignation Chemical Composition, % max unless shown as
33、a range or as a minPractice UNSSeeASTMMagnesium Aluminum Calcium Copper Gadolinium Iron Lithium Manganese Neodymium Nickel RareEarthsSilicon Silver Strontium Yttrium Zinc ZirconiumOther ElementsSpecific Each TotalAZ91E M11919 B80B199B403C8.1-9.30.015 0.005G0.17-0.35 0.0010 0.20 0.40-1.00.01 0.30AZ91
34、E M11918 B93/B93MC8.3-9.20.015 0.005 0.17-0.50 0.0010 0.20 0.45-0.90.01 0.30AZ92A M11920 B80B199C8.3-9.70.25 0.10-0.35 0.01 0.30 1.6-2.40.30AZ92A M11920 B403C8.3-9.70.10 0-0.35 0.01 0.30 1.6-2.40.30AZ92A M11921 B93/B93MC8.5-9.50.20 0.13-0.35 0.010 0.20 1.7-2.30.30AZ101AHM11101C9.5-10.50.05 0.005 0.1
35、3 0.005 0.05 0.75-1.250.30EQ21A M18330 B80B199B403C0.05-0.100.01 1.5-3.0I1.3-1.7 0.40-1.00.30EQ21A M18330 B93/B93MC0.05-0.100.01 1.5-3.0I0.01 1.3-1.7 0.30-1.00.30EV31AJM12310 B80C0.01 1.0-1.70.010 2.6-3.10.0020 0.4K0.05 0.20-0.500.40-1.00.01EV31AJM12311 B93/B93MC0.01 1.0-1.70.010 2.6-3.10.0020 0.4K0
36、.05 0.20-0.500.3-1.00.01EZ33A M12330 B80B199B403C0.10 0.01 2.5-4.0L2.0-3.10.50-1.00.30EZ33A M12331 B93/B93MC0.03 0.010 2.6-3.9L0.01 2.0-3.00.3-1.00.30K1A M18010 B80B403C0.40-1.00.30K1A M18011 B93/B93MC0.03 0.010 0.01 0.30-1.00.30M1A M15100 B107/B107MC0.30 0.05 1.2-2.0 0.01 0.10 0.30M1C M15102 B843C0
37、.01 0.02 0.03 0.50-1.3 0.001 0.05 0.05 0.30QE22A M18220 B80B199B403C0.10 0.01 1.8-2.5I2.0-3.0 0.40-1.00.30QE22A M18221 B93/B93MC0.03 0.15 0.010 1.9-2.4I0.01 2.0-3.0 0.2 0.30-1.00.30WE54A M18410 B80C0.03 0.2 0.03 1.5-2.00.005 2.0M0.01 4.75-5.50.20 0.40 -1.00.20WE54A M18410 B93/B93MC0.03 .20 0.15 1.5-
38、2.00.005 2.0M0.01 4.75-5.50.20 0.3-1.00.30WE54A M18410 B107/B107MC0.03 0.2 0.03 1.5-2.00.005 2.0M0.01 4.75-5.50.20 0.40-1.00.2WE43A M18430 B80C0.03 0.01 0.2 0.15 2.0-2.50.005 1.9M0.01 3.7-4.30.20 0.40-1.00.2WE43A M18431 B93/B93MC0.03 0.18 0.15 2.0-2.50.005 1.9M0.01 3.7-4.30.20 0.3-1.00.30WE43B M1843
39、2 B80C0.02 0.010 0.2 0.03 2.0-2.50.005 1.9MN3.7-4.3N0.40-1.00.01B951115TABLE 2 ContinuedDesignation Chemical Composition, % max unless shown as a range or as a minPractice UNSSeeASTMMagnesium Aluminum Calcium Copper Gadolinium Iron Lithium Manganese Neodymium Nickel RareEarthsSilicon Silver Strontiu
40、m Yttrium Zinc ZirconiumOther ElementsSpecific Each TotalWE43B M18432 B107/B107MC0.02 0.010 0.2 0.03 2.0-2.50.005 1.9MN3.7-4.3N0.40-1.00.01WE43B M18433 B93/B93MC0.01 0.18 0.03 2.0-2.50.004 1.9MO3.7-4.3O0.3-1.00.01WE43C M18434 B90/B90MB107/B107MC0.02P0.005 0.05 0.03 2.0 -2.50.0020 0.30-1.0P3.7 -4.30.
41、06 0.2 -1.00.01ZC63A M16331 B80C2.4-3.00.25-0.75 0.01 0.20 5.5-6.50.30ZC63A M16331 B93/B93MC2.4-3.000.25-0.75 0.001 0.20 5.5-6.50.30ZE41A M16410 B80B403C0.10 0.15 0.01 0.75-1.75L3.5-5.00.40-1.00.30ZE41A M16411 B93/B93MC0.03 0.15 0.01 1.0-1.75L0.01 3.7-4.80.30-1.00.30ZK40A M16400 B107/B107MC3.5-4.50.
42、45min0.30ZK51A M16510 B80C0.10 0.01 3.6-5.50.50-1.00.30ZK51A M16511 B93/B93MC0.03 0.010 0.01 3.8-5.30.3-1.00.30ZK60A M16600 B91B107/B107MC4.8-6.20.45min0.30ZK61A M16610 B80B403C0.10 0.01 5.5-6.50.6-1.00.30ZK61A M16611 B93/B93MC0.03 0.010 0.01 5.7-6.30.3-1.00.30AFor nuclear applications the cadmium a
43、nd boron (high-capture cross-section elements) shall be specified as follows:Cadmium, max, % 0.0001 or 0.00005Boron, max, % 0.00007 or 0.00003BAlloysAJ52A,AJ62A, andAS21B are patented compositions for elevated temperature applications. Interested parties are invited to submit information regarding t
44、he identification of alternatives to these compositionsto ASTM International. your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. ASTM International takes no position respecting the validity of anypatent rights asserted in conne
45、ction with any item mentioned in this specification. Users of this specification are expressly advised that determination of the validity of any such patent rights, and the risk of infringementof such rights, are entirely their own responsibility.CRemainder.DFor alloys AS41B, AM50A, AJ52A, AM60B, AJ
46、62A, and AZ91D, if either the minimum Manganese or maximum Iron content is not met, then the permissible Iron to Manganese ratio shall not exceed 0.010, 0.015,0.021, and 0.032, respectively.EBeryllium 0.0005 0.0015.FManganese minimum limit need not be met if Iron is 0.005 % or less.GIf the iron cont
47、ent exceeds 0.005 %, the Iron to Manganese ratio shall not exceed 0.032 for AZ91E alloy.HRod for welding AZ91 and AZ92 alloys.IRare earth elements are in the form of Didymium, with not less than 70 % Neodymium and remainder substantially Praesodymium.JAlloys EV31A and WE43C are patented compositions
48、, both suitable for elevated temperature applications. Interested parties are invited to submit information regarding the identification of alternatives to thesecompositions to ASTM International. Comments will receive careful consideration at a meeting of the responsible technical committee, which
49、you may attend. ASTM International takes no position respecting the validityof any patent rights asserted in connection with any item mentioned in this specification. Users of this specification are expressly advised that determination of the validity of any such patent rights, and the risk ofinfringement of such rights, are entirely their own responsibility.KOther Rare Earths may also be present to a total maximum of 0.4 %. These Rare Earths shall principally be Cerium, Lanthanum, and Praseodymium.LTotal Rare Earths (TRE) are principally a mixture of Ceriu
